Focus guidance within a three-dimensional interface

ABSTRACT

Methods, systems, and computer-readable media providing focal feedback and control in a three-dimensional display. Focal anchors are provided at different depths and used to determine at what depth the user is currently focusing. The focal anchors are also used to receive input from the user. By looking at a focal anchor, the use can cause the portion of content associated with the focal anchor to be displayed more prominently relative to content displayed at different depths. In one embodiment, predictive feedback is provided at a depth associated with one of the focal anchors.

RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.15/862,473, filed Jan. 4, 2018, titled FOCUS GUIDANCE WITHIN A THREEDIMENSIONAL INTERFACE, which is a continuation of U.S. patentapplication Ser. No. 14/752,008, filed on Jun. 26, 2015, titled FOCUSGUIDANCE WITHIN A THREE-DIMENSIONAL INTERFACE, which is a divisional ofU.S. patent application Ser. No. 13/530,808, filed on Jun. 22, 2012,titled FOCUS GUIDANCE WITHIN A THREE-DIMENSIONAL INTERFACE, which allthree applications are herein incorporated by reference.

BACKGROUND

Computing devices provides feedback to help a user understand the resultof an action taken or, prospectively, what will happen. Traditionally,predictive feedback is presented in 2-D space. Limited screen spacemakes providing helpful predictive feedback a challenge withoutobscuring the interface with the predictive feedback. The goal ofpredictive feedback is to help the user understand a potential result ofan action. A message explaining (or demonstrating) what happens when anicon is selected is a simple example of predictive feedback. Thesemessages are usually very brief to avoid using much screen space.

SUMMARY

This summary is provided to introduce a selection of concepts in asimplified form that are further described below in the detaileddescription. This summary is not intended to identify key features oressential features of the claimed subject matter, nor is it intended tobe used in isolation as an aid in determining the scope of the claimedsubject matter.

Embodiments of the present invention provide feedback within athree-dimensional user interface. The 3-D user interface may displayfocal anchors within different volumes of three-dimensional space. Thefocal anchors may provide feedback that guides a user's focus to anassociated volume of the interface. Different volumes of the interfacemay provide different content. For example, one volume of the interfacemay provide predictive feedback that helps the user understand theconsequences of a proposed action within a main interface. Thus, thefocal anchors may guide the user's focus to the predictive feedbackwithin a volume of the interface and then back to the main content a fewmoments after the feedback is presented. The interface may draw a user'sattention to a particular focal anchor by changing an appearance of thefocal interface, for example by causing it to flash, brighten, etc.

The focal anchors may also serve as a user input. The user maymanipulate the interface by looking at different focal anchors. Theinterface may respond to the user looking at the focal anchor byimproving the visibility of content associated with the focal anchor.Thus, the user may change the appearance of the content in a volume ofthe interface by looking at the three-dimensional anchor associated withthat volume.

The focal anchors work using gaze detection, which determines thedirection the eyes are looking. The interface displays the focal anchorsfar enough apart from one another that the interface may determine whichanchor the user is gazing at. For example, when it is determined throughgaze detection that the user is looking at a focal anchor within aparticular three-dimensional volume then content in other volumes maybecome translucent or be removed entirely to improve the user's abilityto focus on content within the relevant three-dimensional volume.Embodiments of the invention may also measure eye vergence oraccommodation to determine what the user is viewing or on what the useris focusing. These techniques may be used instead of or in combinationwith gaze detection. The 3-D anchors may remain visible at all timeseven when content within other volumes of three-dimensional space aretemporarily removed.

BRIEF DESCRIPTION OF THE DRAWINGS

Embodiments of the invention are described in detail below withreference to the attached drawing figures, wherein:

FIG. 1 is a block diagram of an exemplary computing environment suitablefor implementing embodiments of the invention;

FIG. 2 is a diagram of a volumetric display device suitable forimplementing embodiments of the invention;

FIG. 3 is a diagram depicting an exemplary three-dimensional displayarea generated by a volumetric display device, in accordance with anembodiment of the present invention;

FIG. 4 is a diagram showing a focal adjustment by the user on athree-dimensional interface, in accordance with an embodiment of thepresent invention;

FIG. 5 is a diagram showing focal anchors within a three-dimensionaldisplay, in accordance with an embodiment of the present invention;

FIG. 6 is a diagram illustrating gaze detection, in accordance with anembodiment of the present invention;

FIG. 7 is a diagram illustrating gaze detection, in accordance with anembodiment of the present invention;

FIG. 8 is a diagram illustrating an interface that is controlled by theuser's gaze, in accordance with an embodiment of the present invention;

FIG. 9 is a diagram illustrating use of focal anchors to draw a user'sattention to a particular volume, in accordance with an embodiment ofthe present invention;

FIG. 10 is a flow chart showing a method of providing multiple channelsof information in three-dimensional space, in accordance with anembodiment of the present invention;

FIG. 11 is a flow chart showing a method of providing multiple channelsof information at different depths, in accordance with an embodiment ofthe present invention; and

FIG. 12 is a flow chart showing a method for providing focal anchors indifferent depths of three-dimensional display space to draw a user toelements displayed at a desired depth, in accordance with an embodimentof the present invention.

DETAILED DESCRIPTION

The subject matter of embodiments of the invention is described withspecificity herein to meet statutory requirements. However, thedescription itself is not intended to limit the scope of this patent.Rather, the inventors have contemplated that the claimed subject mattermight also be embodied in other ways, to include different steps orcombinations of steps similar to the ones described in this document, inconjunction with other present or future technologies. Moreover,although the terms “step” and/or “block” may be used herein to connotedifferent elements of methods employed, the terms should not beinterpreted as implying any particular order among or between varioussteps herein disclosed unless and except when the order of individualsteps is explicitly described.

Embodiments of the present invention describe a three-dimensional userinterface that provides different content within different volumes ofthe interface. The 3-D user interface includes focal anchors that aredisplayed within different volumes of three-dimensional space. The focalanchors may be used to provide feedback that guides a user's focus to anassociated volume of the interface. Different volumes of the interfacemay provide different content. For example, one volume of the interfacemay provide predictive feedback that helps the user understand theconsequences of a proposed action within a main interface. In anotherembodiment, the historical information may be provided to show aprevious version of the interface, for example, in the game context, toshow where an enemy used to be standing. Thus, the focal anchors may beused to guide the user's focus to the metadata, scene versions, or othercontent that is added to a 3-D volume within the interface.

While most embodiments of the invention are described within thisdescription in the single user context for the sake of simplicity,embodiments are not limited to single user scenarios. For example,embodiments of the invention may work when two or more users areco-located near each other while viewing a single display. In anotherexample, the display is a multiplexed display that sends different 3-Dviews to different users that are viewing the display from meaningfullydifferent depths. In another embodiment, users may be in physicallydifferent locations with different displays and input devices.

Embodiments of the present invention use gaze detection, whichdetermines the direction the eyes are looking, to make adjustments tothe three-dimensional interface. For example, when it is determinedthrough gaze detection that the user is looking at a focal anchor withina particular three-dimensional volume then content in other volumes maybecome translucent or be removed entirely to improve the user's abilityto focus on content within the relevant three-dimensional volume. Inthis way, the user may manipulate the interface by looking at different3-D anchors. The 3-D anchors may remain visible at all times even whencontent within other volumes of three-dimensional space are temporarilyremoved. This way, the user may restore the content in a differentvolume by looking at the three-dimensional anchor associated with thatvolume. Embodiments of the invention may also measure eye vergence oraccommodation to determine what the user is viewing or on what the useris focusing. These techniques may be used instead of or in combinationwith gaze detection.

Having briefly described an overview of embodiments of the invention, anexemplary operating environment suitable for use in implementingembodiments of the invention is described below.

Exemplary Operating Environment

Referring to the drawings in general, and initially to FIG. 1 inparticular, an exemplary operating environment for implementingembodiments of the invention is shown and designated generally ascomputing device 100. Computing device 100 is but one example of asuitable computing environment and is not intended to suggest anylimitation as to the scope of use or functionality of the invention.Neither should the computing device 100 be interpreted as having anydependency or requirement relating to any one or combination ofcomponents illustrated.

The invention may be described in the general context of computer codeor machine-useable instructions, including computer-executableinstructions such as program components, being executed by a computer orother machine, such as a personal data assistant or other handhelddevice. Generally, program components, including routines, programs,objects, components, data structures, and the like, refer to code thatperforms particular tasks, or implements particular abstract data types.Embodiments of the invention may be practiced in a variety of systemconfigurations, including handheld devices, consumer electronics,general-purpose computers, specialty computing devices, etc. Embodimentsof the invention may also be practiced in distributed computingenvironments where tasks are performed by remote-processing devices thatare linked through a communications network.

With continued reference to FIG. 1, computing device 100 includes a bus110 that directly or indirectly couples the following devices: memory112, one or more processors 114, one or more presentation components116, input/output (I/O) ports 118, I/O components 120, and anillustrative power supply 122. Bus 110 represents what may be one ormore busses (such as an address bus, data bus, or combination thereof).Although the various blocks of FIG. 1 are shown with lines for the sakeof clarity, in reality, delineating various components is not so clear,and metaphorically, the lines would more accurately be grey and fuzzy.For example, one may consider a presentation component such as a displaydevice to be an I/O component 120. Also, processors have memory. Theinventors hereof recognize that such is the nature of the art, andreiterate that the diagram of FIG. 1 is merely illustrative of anexemplary computing device that can be used in connection with one ormore embodiments of the invention. Distinction is not made between suchcategories as “workstation,” “server,” “laptop,” “handheld device,”etc., as all are contemplated within the scope of FIG. 1 and referenceto “computer” or “computing device.”

Computing device 100 typically includes a variety of computer-storagemedia. By way of example, and not limitation, computer-storage media maycomprise Random Access Memory (RAM); Read Only Memory (ROM);Electronically Erasable Programmable Read Only Memory (EEPROM); flashmemory or other memory technologies; Compact Disk Read-Only Memory(CDROM), digital versatile disks (DVDs) or other optical or holographicmedia; magnetic cassettes, magnetic tape, magnetic disk storage or othermagnetic storage devices. The computer-storage media may benon-transitory.

Memory 112 includes computer-storage media in the form of volatileand/or nonvolatile memory. The memory 112 may be removable,nonremovable, or a combination thereof. Exemplary memory includessolid-state memory, hard drives, optical-disc drives, etc. Computingdevice 100 includes one or more processors 114 that read data fromvarious entities such as bus 110, memory 112 or I/O components 120.Presentation component(s) 116 present data indications to a user orother device. Exemplary presentation components 116 include a displaydevice, speaker, printing component, vibrating component, etc. I/O ports118 allow computing device 100 to be logically coupled to other devicesincluding I/O components 120, some of which may be built in.Illustrative I/O components 120 include a microphone, joystick, gamepad, satellite dish, scanner, printer, wireless device, etc.

Embodiments of the present invention work with displays that generatethree-dimensional interfaces. In one embodiment, the three-dimensionalinterface is generated in three physical dimensions, not in twodimensions. For example, the image may be comprised of voxels, notpixels. This application will refer to displays that render objects inthree dimensions as volumetric displays. Portions of volumetricinterfaces are described as interface volumes. Examples of volumetricdisplays include holographic displays, mutiplanar displays, rotatingpanel displays, a laser generated in 3D, and integral imaging. Thevolumetric display may render images in three-dimensions to the unaidedhuman eye.

In FIG. 2, an exemplary a volumetric display device 200 is depicted, inaccordance with an embodiment of the present invention. The exemplarydevice 200 comprises three different transparent user interfaces stackedon top of each other, but at different distances from the user. In oneembodiment, the transparent user interfaces are liquid crystal displaysbuilt on a transparent substrate. Each display may have its own drivers,electronics, power source, and processors (not shown) to drive thedisplay. In this case, the display 200 comprises a first layer 210, asecond layer 220, and a third layer 230. The first layer 210 displays abeach scene 215. The second layer 220 depicts a palm tree 225 and thethird layer depicts a child 237. The first layer 210 is a distance 235from the second display layer 220. The second display layer 220 is adistance 236 from the third display layer 230. Distances 235 and 236 maybe different.

FIG. 3 is an illustration depicting an exemplary three-dimensionaldisplay area 300 generated by a volumetric display device, such as theone depicted in FIG. 2. The display area 300 includes objects that existin three dimensions and planar objects that may simulate depth. Thethree-dimensional display area 300 comprises four different volumes.Each volume appears as a cube for the sake of illustration. The firstthree-dimensional display volume 304 is defined by a focal range 330that runs from focal point 331 to focal point 332. The first displayvolume 304 depicts a beach and cloud scene 305. In the example shown,the cloud scene 305 appears to be projected onto a plane at the back ofthe three-dimensional volume. This is consistent with one embodiment ofthe present invention where the interface comprises content displayed ona series of focal planes that are separated by some distance. However,embodiments of the present invention are not limited to displayingcontent within a plane. For example, the interface may project an imagethroughout a portion of, or all of, a display volume. Further, a singleobject such as a snake or a cloud could transition between multiplevolumes of space.

Display volume 306 is defined by a second focal range 342 running fromfocal point 343 to focal point 344. The second focal range 342 may be adifferent length than focal range 330. The second display volume 306depicts a palm tree 307. While the Z dimension of the display volume 306is defined by focal range 342, the X and Y dimensions of the volume aredefined by the viewable area projected by the device generating the userinterface.

The third display volume 308 is defined by a third focal range 334 thatruns from focal point 345 to focal point 346. Display volume 308 depictsa child 309. The child 309 is intended to be shown as an objectprojected within the volume rather than on a plane at the back of thethird three-dimensional volume.

The fourth volume 310 starts at point 346 and ends at the user. Thethird display volume displays text 311 “Florida vacation 2010.”

Generally, a user focuses on an object by converging the sight lines oftheir eyes on the object. The sight line from a user's eyes are depictedwithin FIG. 3. The right eye 320 and the left eye 322 of the user aredepicted at the bottom of the figure. As can be seen, sight lines 323and 321 converge at focus point 325, which is near object 309. Thus, theobject 309 would be in focus to a user. The tree 307 and the beach scene305 could be somewhat out of focus. Similarly, the Florida vacation text311 may also be out of focus. The degree to which objects outside of thefocal point 325 are out of focus depends on the various focal rangesused by the display. The focal ranges may mimic the characteristics ofthe real world or use different metrics to achieve an artistic ordidactic goal.

Turning now to FIG. 4, a focal adjustment by the user on athree-dimensional interface is illustrated, in accordance with anembodiment of the present invention. As can be seen, FIG. 4 isessentially similar to FIG. 3 described previously. However, the userhas changed their focus to converge on point 425, which is within thefirst display volume 304. As can be seen, sight lines 421 and 422converge at point 425. Several measurable changes occur to the user'seyes when their focus changes. The muscles in the eye may change theshape of the eye to adjust the focus. Changing the shape of the eye andeye lens may be described as accommodation. Adjusting the focus of faraway objects depends mostly on accommodation. When focusing on closerobjects, the vergence (rotation of the eyes in their respective sockets)is the eye's primary focus mechanism. Vergence and accommodation may bemeasured by eye sensors. For example, vergence may be measured by acamera with a view of the eyes. Embodiments of the invention may measurea single eye or both eyes.

Turning now to FIG. 5, focal anchors within a three-dimensional displayare illustrated, in accordance with the present invention. As can beseen, the three-dimensional display depicted in FIG. 5 is similar to thedisplay described previously with reference to FIG. 3. However, a focalanchor has been added to each volume. Volume 304 includes focal anchor510 at the bottom left-hand corner of the volume. Though depicted as atwo-dimensional icon, focal anchor 510 could be a bar or other objectthat is displayed throughout the volume 304 from point 331 to point 332.

The second display volume 306 comprises a focal anchor 520. The thirddisplay volume 308 comprises a focal anchor 530 and the fourth displayvolume 310 includes focal anchor 540. In one embodiment, the focalanchor is displayed at the same focal distance from the user as theprimary content displayed within the relevant display volume. Thus, thefocal anchors 510 and 520 may be displayed adjacent to a plane towardsthe back of the display volume. Focal anchor 530 may be displayed at afocal distance that is at a depth consistent with where the child 309 isdisplayed.

Embodiments of the present invention can determine which focal anchorthe user is looking at by examining the user's gaze. A user's gaze ismeasured by determining where the user is looking. As can be seen fromFIG. 5, the anchors within each volume are depicted in opposite cornersof the interface to improve the accuracy of the gaze detection. In oneembodiment, the focal anchors and content are arranged to prevent gazeoverlap between content and an anchor. In other words, various gazepoints are reserved for only the focal anchors. However, embodiments ofthe present invention are not limited to displaying the volume anchorsin opposite corners or reserving gaze points.

Turning now to FIGS. 6 and 7, gaze detection and gaze change isillustrated. Gaze detection determines where the user is looking bytracking eye movement and converting the eye movement to a gazedirection. In one embodiment, eye movement is tracked by analyzing thepupil movement in one or both eyes. Different devices may be used totrack eye movement. In one embodiment, a camera is used to track themovement of the center of the pupil. Infrared light may be used tolocate a corneal reflection. A vector is calculated between the centerof the pupil and the reflection to determine gaze. The user may need togo through a calibration routine for gaze detection to be effective. Inone embodiment, the user gazes at each focal anchor within an interfaceand provides an input indicating when the user is looking at aparticular focal anchor. This information is then used to identify theuser's gaze by tracking subsequent movement. The calibration routine mayneed to be repeated if the user or interface move greater than athreshold calibration distance. User movement may be detected by acamera or other device. If greater than the threshold movement occur,then the user may be asked to repeat the calibration routine.

In FIG. 6, the user 600 is looking more or less straight ahead as can beseen from the user's eyes 610 and 612. In FIG. 7, the user's gaze hasmoved to the side as can be seen from the new direction of the user'seyes 720 and 730. The user's gaze may be detected by a camera mounted infront of the user. In one embodiment, the one or more cameras used todetect the user's gaze are mounted on the device generating thethree-dimensional user interface. The cameras may also be used to detectgestures made by the user. In another embodiment, the camera is mountedon the users head with a view of the user's eyes. While a user's gazemay change as the eyes move from side to side, the user's gaze may alsochange as the user's eyes rotate as the user adjusts focus.

In addition to gaze detection, accommodation detection may be used todetermine what the user is viewing. Accommodation occurs when eyemuscles change the shape of the eye to adjust the user's focus. Thechange in the eye shape may be detected by a head mounted sensor orother sensor capable of detecting changes in eye shape. As with gazedetection, the accommodation detection may use calibration. The user maybe asked to focus on points at several different depths and provide anindication when focusing at each depth. The calibration points maycorrespond with the focal anchors. A user's focus may be extrapolatedbetween points to more closely ascertain the user's focus. Accommodationdetection may be used in combination with gaze detection. In oneembodiment, the calibration routine includes all focal anchors. In thisway, the user's gaze and accommodation can be combined to determine whenthe user is viewing a focal anchor.

Turning now to FIG. 8, an interface that is controlled by the user'sgaze is illustrated, in accordance with an embodiment of the presentinvention. As can be seen, the interface depicted in FIG. 8 is similarto the interface depicted in FIG. 3. In the illustration shown, it isdetermined that the user's gaze is looking at focal anchor 820. Inresponse to determining that the user's gaze is directed at focal anchor820, objects in the other display volumes are either removed or faded.As can be seen, the text “Florida Vacation 2010” has been removed fromdisplay volume 310 that was shown previously in FIG. 3. The child 309has been faded by increasing the translucency of the child 309. The tree307 remains unchanged within display volume 306. And similarly, thebeach scene 305 within display volume 304 has been faded. In oneembodiment, objects within display volumes between the user and thedisplay volume indicated by the user's gaze (referred to as an activevolume or depth) are removed, while those behind the indicated displayvolume are only diminished. In another embodiment, objects in focalplanes between the user and the display volume on which the user's gazeis directed are removed, except those objects within the display volumedirectly on top of the selected display volume. In yet anotherembodiment, objects in other focal planes are diminished based on acloseness of relationship to objects in the active focal plane. In thiscase, the closer the relationship, the less the objects are diminished.In yet another embodiment, only objects within other focal planes thatocclude content in an active volume are diminished. In other words,content that is not likely to confuse the user's focus or block theirview of an active object is left alone and only content blocking theuser's view of content in an active volume is altered.

Images/content within non-focal volumes may be diminished severaldifferent ways. For example, the rendering style may be changed for theimage, the image fidelity may be changed, the image could blurred, theimages color may be changed to make it less prominent, and the level ofdetail may be decreased.

In some embodiments, the focal anchors and content may have overlappinggaze points. When the focal anchor and content share a gaze point,embodiments of the invention may determine that the user is viewing afocal anchor by combining gaze with focus detection, such asaccommodation or vergence detection. Thus, the interface may firstdetermine that a focal anchor shares a gaze point with other content.Upon making this determination, the interface may transition into ajoint-detection mode that uses other methods to determine what the useris viewing, either alone or in combination with gaze detection. Upondetermining the user is viewing a focal anchor, the interface may bemanipulated accordingly, for example by emphasizing content in thevolume associated with the viewed focal anchor.

In one embodiment, when overlapping gaze points are detected the focalpoints are cycled to different locations within their designated volume.To manipulate the interface using the moving focal anchors, the userfollows the focal anchor with their gaze as the focal anchor moves. Inone embodiment, the focal anchor is moved to a point in the volume thatdoes not share a gaze point with content shown in other volumes.

Eye gestures may be performed by the user to select a focal anchor. Forexample, the user may perform an eye gesture, such as rolling their eyesupward away from the display, and then down to a focal anchor. Once theeye-roll gesture is detected, the interface will interpret subsequenteye movements as the user trying to select a focal anchor. The gesturemay also activate a volume selection mode. Once in selection mode, thenext focal anchor the user views will be considered as selectedregardless of whether the focal anchor shares a gaze point with othercontent. In other words, once in selection mode, the next focal anchorthe user views is interpreted as an attempted selection. In oneembodiment, instead of viewing a focal anchor, in selection mode, theuser may focus on a volume as a way to select that volume. Onceselected, the appearance of content in the volume may be enhanced.Detection of volume selection may use vergence and accommodationdetection.

Turning now to FIG. 9, use of focal anchors to draw a user's attentionto a particular volume is illustrated, according to an embodiment of thepresent invention. In FIG. 9, focal anchor 830 is flashing as depictedby the dash lines. Upon determining that the user's gaze is directed atfocal point 830, the objects in the other display volumes may fade andthe object within display volume 308 may be restored, if it had beenpreviously faded. Again, fading is only one example of how the contentcould be diminished. In this case, the child 309 is unfaded while thepalm tree 307 is faded. In this case, the text Florida Vacation 311within volume 310 is restored, but in faded. Restoring previouslyremoved objects in display volumes before and after a selected displayvolume allows a user to see those other objects even if they are not inperfect focus to the user. In one embodiment of the invention, theobjects depicted in different volumes are related by their closeness toeach other. For example, in one embodiment a sequence of dance movesthat a user is to perform as part of a game are depicted in differentthree-dimensional volumes. The user may scroll through these dance movesby adjusting their focus on different planes. The user may gaze at adesired focal point or focal anchor and the display can be adjusted toremove illustrated dance steps in planes in front of or behind thedesired dance step is displayed.

As mentioned, in some embodiments, the focal anchors and content mayhave overlapping gaze points. In this case, the anchors may bemanipulated to enable their continued function. For example, when ananchor is being used to draw the user's attention to a particular volumeit may flash or cycle between different points within the desiredvolume. The determination that the focal anchor has caught the user'sattention may be made by combining gaze detection with accommodation andvergence detection when content and focal anchors share a gaze point.

Turning now to FIG. 10, a method 1000 of providing multiple channels ofinformation in three-dimensional space is shown, in accordance with anembodiment of the present invention. The method 1000 may be implementedwith a device capable of generating a volumetric three-dimensionaldisplay, as described previously.

At step 1010, a first content is output for display in a firstthree-dimensional volume defined, in part, by a first depth range. Asmentioned previously, the range may run from the eyes of a user viewingthe display to the back of the display. In this case, the range may bethought of as the Z dimension the extents of the volume in the X and Ydirection are defined by the capabilities of the display device.Embodiments of the present invention are primarily concerned withvolumes at different ranges, because the range has the largest impact onhow much a person needs to adjust their focus as objects are further ornearer from them in the Z direction. For example, a user's hand directlyin front of their face may be in focus while an object several feet awayis out of focus. As the user adjusts their focus on to the object threefeet away their hand in front of their face becomes out of focus.

At step 1020, a second content is output for display in a secondthree-dimensional area defined, in part, by a second depth range that isbetween a person viewing the second content and the first content. Forexample, taking FIG. 3 as an illustration, the first three-dimensionalvolume could correspond volume 304 and the second three-dimensionalvolume could correspond to volume 306, which is in front of volume 304.

At step 1030, the person is determined to be viewing the second content.In one embodiment, the user is determined to be viewing the secondcontent because the user first gazes at a focal anchor associated withthe second content. The first content within the first volume may haveits own focal anchor associated with it. Other volumes apart from thefirst and second volume mentioned previously may have their own focalanchors displayed at a depth consistent with the volume. Accommodationor vergence detection may also be used to determine what the user isviewing, in some embodiments.

At step 1040, in response to determining the person's eyes are focusingon the second content, visibility of the first content or the secondcontent is adjusted to improve the visibility of the second content. Forexample, the first content's visibility could be reduced to emphasizethe second content, even without changing characteristics of the secondcontent. In another example, the second content's visibility is improvedby reducing the translucency on the second content. A combination ofreducing the visibility of the first content and increasing thevisibility of the second content is also possible.

As mentioned previously, the focal anchors in the first and secondvolume may be located in opposite corners or otherwise far enough apartthat a person's gaze towards an anchor may be differentiated from gazingat another anchor or at the primary content displayed within a volume.In one embodiment, the focal anchors are displayed along the edges ofthe display volume. Further, a buffer may be added between the anchorand the content to help determine when a user's gaze is on the contentand when it is on the anchor. A person's gaze may be determined using acamera that has a view of the user's eyes, as described with referenceto FIGS. 6 and 7.

In one embodiment, the first content is a primary content such as amovie, productivity program, website, or video game. The second contentis out-of-band information that annotates the primary display content.For example, the second content may be a help interface. In the videogame context, the secondary content could be a director's cut oradditional scene information. In the game scenario, the secondarycontent could be play tips, a friends brag video, or communicationsreceived (e.g., social feed, email, text, phone call).

In one embodiment, the second content depicts a gesture that can berecognized by a computing device to perform an action on the firstcontent. The gesture display may be a form of predictive feedback andused to train the user how to make relevant gestures. For example in agame setting, the secondary content may show the user how to make agesture that controls a newly introduced game element, such as a newweapon or character function. The gesture could also control an actionwithin a productivity application such as a word processor, spreadsheet,email application, picture application, or presentation application. Inone embodiment, the gesture is a 3-D gesture received by a camerawithout the user touching a physical interface. In another embodiment,the gesture shows the user how to touch a touch screen in a certain wayto make an appropriate gesture or to affect a certain action.

Turning now to FIG. 11, a method 1100 of providing multiple channels ofinformation at different depths is shown, in accordance to theembodiment of the invention. At step 1110, a first content is output fordisplay in a first three-dimensional volume defined, in part, by a firstdepth range. In one embodiment, the first content is a primary display,as explained previously. The primary display is associated with the mainmedia content or application to which the user is giving their presentattention.

At step 1120, a user is determined to have above a threshold probabilityof providing an input related to the first content. For example, a usermay be moving their hand towards an input button on the touch screen. Atsome point, the user's hand gets close enough to a particular input thatthe threshold probability is reached. The user's previous interactionswith the interface may also be taken into consideration. For example, asa user approaches a frequently used input, the threshold probability maybe reached while the input mechanism, be it a hand or other input devicesuch as a mouse, is further from the familiar input than whenapproaching an unused input.

In one embodiment, the input is a series of gestures made by the user.As the user draws to the close of the sequence of gestures the thresholdprobability could be reached. In another embodiment, the input istouching a touch screen in a pattern consistent with a gestures. In thiscase, the probability could be based on the user touching the screen ina manner consistent with the current trajectory of the user's hand. Inanother embodiment, the threshold probability is determined apart fromany observed user interaction and is entirely based on a prediction ofthe user's intent taking into consideration the user's previousbehaviors and available options. In yet another embodiment, thethreshold probability is determined to be reached when the user actuallyprovides a first input such as selecting a delete button, but has yet toselect a confirmation or secondary input. In this scenario, the usercould provide an input to delete content or move content to a differentfolder or send an email or text and have yet to provide a confirmation.The feedback shown in the second content could illustrate what happenedwhen the confirmation is provided. The second content could, in effect,be a confirmation screen.

At step 1130, in response to the determination, a visibility of thefirst content is decreased. At step 1140, a second content is output fordisplay in a second three-dimensional volume defined, in part, be asecond depth range that is between a user viewing the second content andthe first depth range. The second content provides a depiction of whatwill occur upon the user providing the input. In a case where aconfirmation is required, the depiction may assume a yes input. Or a yesconfirmation. For example, if the user had selected a series of emailsor other objects and pushed the delete button then the second contentcould be an animation showing the files flying to a recycle bin. Thesecond content will be easier for the user to focus on because the firstcontent's visibility has been decreased in step 1130.

When the input is a partially performed gesture the second content couldbe an animation of the complete gesture and an animation showing whatwill occur to the primary content upon completion of the gesture. In oneembodiment, the first content is still visible through the secondcontent. In other words, the second content has a degree of translucencythat allows the primary content to be viewed, though it may be out offocus to the user when they are viewing the second content. As describedpreviously, the user may restore the original interface by gazing at afocal anchor that is associated with the first content or first volume.Upon detecting that the user has gazed at the focal anchor the secondarycontent may be removed or diminished and the primary content'svisibility restored to regular viewing parameters.

Turning now to FIG. 12, a method 1200 for providing focal anchors indifferent depths of three-dimensional display space to draw a user toelements displayed at a desired depth is shown, in accordance with theembodiment of the present invention. As mentioned previously, method1200 may be performed using a volumetric three-dimensional display.

At step 1210, a first content that comprises a first focal anchor isoutput for display in a first three-dimensional volume defined, in part,by a first depth range. The first focal anchor may be displayed at theedge of the first volume. For example, the first focal anchor may bedisplayed in the lower left hand corner of the first three-dimensionalvolume. The focal anchor may be displayed at a depth range in the middleof the volume or at a depth adjacent to the content shown within thefirst volume. For example, if the first content is displayed at the backof the first depth range than the focal anchor may also be displayedtowards the back of the first depth range.

At step 1220, a second content that comprises a second focal anchor isoutput for display in a second three-dimensional volume defined, inpart, by a second depth range that is between a user viewing the secondcontent and the first virtual depth range. In other words, the secondvolume is in front of the first content and has the potential to blockthe first content. The second focal anchor is displayed within thesecond volume at a point where the user's gaze is able to bedistinguished between the first focal anchor and the second focalanchor. For example, the focal anchors could be displayed in oppositecorners on opposite sides of the display. With displays that havemultiple volumes, the focal anchors associated with each display volumemay be arranged so that differentiation of a viewer's gaze is possible.

At step 1230, an appearance of the second focal anchor is changed todraw the user's focus to the second virtual depth range. For example,the second focal anchor may begin to flash or otherwise change colors.An audible sound vibration or other output may be combined with thechange in appearance to further emphasize the change and to draw theuser's attention.

At step 1240, updated second content is output with an animation andannotation related to the first content. In other words, the secondcontent may provide help information or other supplemental informationrelated to the primary content. As this information changes, the user'sattention may be drawn to it through the second focal anchor. Using thesecond focal anchor also helps the user to focus their eyes on thesecond content. The user's ability to view the second content may beenhanced by decreasing the visibility of the first content andincreasing the opacity of the second content so that it includes thefirst content at least temporarily. Once the user's gaze is directedback to the first focal anchor the second content may be removed or thevisibility diminished by, for example, increasing the translucency tothat the first or primary content is again viewable.

Embodiments of the invention have been described to be illustrativerather than restrictive. It will be understood that certain features andsubcombinations are of utility and may be employed without reference toother features and subcombinations. This is contemplated by and iswithin the scope of the claims.

The invention claimed is:
 1. A method of providing multiple holographicsin three-dimensional space, the method comprising: outputting a firstholographic content located in a first three-dimensional volume defined,in part, by a first depth range; outputting a second holographic contentlocated in a second three-dimensional volume defined, in part, by asecond depth range that is between a person viewing the secondholographic content and the first holographic content; determining usinga head mounted sensor that the person is viewing the second holographiccontent; and in response to the determining, changing an appearance ofthe first holographic content to form a new first holographic contentthat makes the second holographic content appear more prominent.
 2. Themethod of claim 1, wherein the first holographic content and the secondholographic content remain visible to the person.
 3. The method of claim1, wherein the new first holographic content is more translucent thanthe first holographic content.
 4. The method of claim 1, wherein themethod further comprises changing an appearance of the secondholographic content to make the second holographic content moreprominent than the first holographic content.
 5. The method of claim 4,wherein changing the appearance comprises decreasing a translucency ofthe second holographic content.
 6. The method of claim 4, whereinchanging the appearance comprises causing the second holographic contentto flash.
 7. The method of claim 4, wherein changing the appearancecomprises causing the second holographic content to cycle betweendifferent points within the second three-dimensional volume.
 8. Themethod of claim 1, wherein the first holographic content and the secondholographic content are a single object transitioning between the firstthree-dimensional volume and the second three-dimensional volume.
 9. Acomputing system comprising: a processor; and computer storage memoryhaving computer-executable instructions stored thereon which, whenexecuted by the processor, implement a method of providing multiplechannels of information in three-dimensional space, the methodcomprising: outputting a first holographic content located in a firstthree-dimensional volume defined, in part, by a first depth range;outputting a second holographic content located in a secondthree-dimensional volume defined, in part, by a second depth range thatis between a person viewing the second holographic content and the firstholographic content; receiving an indication that the person is viewingthe second holographic content; and in response to the receiving,changing an appearance of the second holographic content to make thesecond holographic content more prominent than the first holographiccontent.
 10. The computing system of claim 9, wherein the firstholographic content and the second holographic content remain visible tothe person.
 11. The computing system of claim 9, wherein said changingcomprises decreasing a translucency of the second holographic content.12. The computing system of claim 9, wherein the method furthercomprises changing an appearance of the first holographic content tomake the second holographic content more prominent than the firstholographic content.
 13. The computing system of claim 12, wherein saidchanging comprises increasing a translucency of the first holographiccontent.
 14. The computing system of claim 9, wherein the firstholographic content and the second holographic content are a singleobject transitioning between the first three-dimensional volume and thesecond three-dimensional volume.
 15. The computing system of claim 9,wherein the method further comprises: determining that the person isviewing the second holographic content using a head mounted sensor. 16.One or more computer-storage media hardware devices storingcomputer-useable instructions that, when executed by a computing device,perform a method of providing multiple holographics in three-dimensionalspace comprising: outputting a first holographic content located in afirst three-dimensional volume defined, in part, by a first depth range;outputting a second holographic content located in a secondthree-dimensional volume defined, in part, by a second depth range thatis between a person viewing the second holographic content and the firstholographic content; receiving an indication that the person is viewingthe first holographic content; and in response to the receiving,changing an appearance of the first holographic content to make thefirst holographic content more prominent than the second holographiccontent.
 17. The media of claim 16, wherein the indication is receivedfrom a device coupled to a head mounted sensor.
 18. The media of claim16, wherein said changing comprises increasing a translucency of thefirst holographic content.
 19. The media of claim 16, wherein saidchanging the appearance comprises causing the first holographic contentto cycle between different points within the first three-dimensionalvolume.
 20. The media of claim 16, wherein said changing the appearancecausing the first holographic content to flash.